Chables donnay



(No Model.) r

0. D0 NNAY.

Shears for Cutting Metal Plates. No. 242,631. Patented June 7,1881.

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NlTE- STATES PATENT OFFICE,

CHARLES DONNAY, OF PARIS, FRANCE.

SHEARS FOR CUTTI NC M ETAL PLATES.

SPECIFICATION forming part of Letters Patent No. 242,611, dated June 7, 1881,

Application filed February 1, 1881.

To all whom it may concern:

Be it known that 1, CHARLES DUNNAY, of the city of Paris, in the Republic of France, have invented a certain new and useful Improvement in Shears for Gnttin g Metal Plates, of which the following is a specification.

My invention relates to shears for metal plates, in which are comprised a movable and a fixed shear-blade, between which the plates are fed. In such shears it is very desirable to have the movable blade so connected with its operating mechanism that it may be readily disconnected therefrom, to enable the operator to readily stop the movable blade while he is adjusting a plate to be cut, and then connect it with its operating mechanism, which operates continuously.

My invention consists in a novel combination of parts, hereinafter fully specified,whereby the movable shear-blade is connected with and disconnected from its operating mechanism.

In the accompanying drawings, Figure 1 represents a side view of shears embodying my invention, a portion being broken away to better illustrate my invention. Fig. 2 represents avertical transverse section upon the dotted line or m, Fig. 1; and Fig. 3 represents a similar section upon the dotted line 3/ y, Fig. 1.

Similar letters of reference designate corre- A B designate, respectively, the lower and upper shear-blades of the machine, the first of which is stationary and the latter of which is movable.

The frame whereby all the parts of the machine are supported and held in proper relation to each other is composed ot'two portions, 0 D, both of which, as here shown, are formed in a single casting. Thelower portion, 0, has bolted to it the stationary lower shear-blade, A, as clearly shown in the several figures.

The upper movable shear-blade, B, is bolted securely to acarriage, E, which fits in a slideway or recess in the upper portion, 1), of the frame, and is pivoted or fulcrumed by a center pin or pivot, it, upon which it may swing or vibrate. The recess or slidewayin the portion D of the frame which receives the car- (No model.)

riage E is closed by a plate, D, as seen clearly in Fig. 1, which shows a portion of the plate as broken away, so as to illustrate the parts back of it. The two portions 0 and D of the frame are not in line, but the upper portion, D, extends down upon or laps overthe side of the lower portion, (1, in rear of the shearblades, as shown in dotted lines in Fig. 1, and in section in Fig. 3. The upper face, I), of the lower portion, 0, is approximately straight and extends in line with the lower shearblade, as seen in full outline in Fig. 1, while the lower face, a, of the upper portion, D, is inclined downward from the back end of the shear-blades toward the rear of the machine, as seen dotted in Fig. 1.

I will now describe the mechanism for operatin g the carriage E, to which the movable shear-blade B is attached, and which, as above described, swings upon a center or fulcrum pin, a.

' F designates a shaft arranged in a bearing in the upper portion, D, of the frame, and receiving rotary motion through a wheel, G, and pinion G from a shaft, G which may be rotated by a belt and pulley or other means. Upon the inner end of the shaft F is formed an eccentric-pin, j, which fits in a box or block,

9. The box or block 9 fits in an opening, g,

in a second block, H, which is movable vertically in a slideway or opening, I, in the carriage E. By this arrangement a vertical reciprocating motion is imparted to the block H in said slideway or opening I. Upon the lower face of the block H are projections h, slightly longer than the throw of the eccentric-pin f, and below said block H, in the slideway I, is a block or seat, J, adapted to be moved horizontallyin said slideway, andprovided with spaces or recesses i, adapted to receive the projections it on' the block H. When the block or seat J is in the position shown in Fig. l, the projections it upon the block H enter the spaces or recesses i in the said seat as the shaft F is rotated, and thus do not force the carriage E downward but when the seat J is moved toward the right the projections h strike upon corresponding projections, or the portions between the spaces t of the seat or block, and then force the carriage E downward. The

block or seat J may be moved horizontally by tally-adjustable seat or block J, having spaces a rod or lever suitably connected therewith. i, substantially as and for the purpose speci- 1o "Vhat I claim as my invention, and desire to fierl.

secure by Letters Patent, is-

The combination of theshear-blade carriage DONNAY' E, the shaft F,With its eccentric-pinf, the box \Vitnesses: or block g, the block H, provided upon its un- S. VERDIERT, der side with projections h, and the horizon- E. GOPPIN. 

